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The skill.md file is a structured, machine-readable API reference that tells AI agents what they can do with the Upriver API. It follows the skill.md specification and includes endpoint descriptions, required parameters, and usage guidance in a format LLMs can reliably work with. View the Upriver skill.md at: docs.upriver.ai/skill.md
Both skill.md and llms.txt help agents work with the Upriver API, but they serve different purposes.
  • skill.md is a capability summary. It tells agents what actions are available, what inputs they need, and what constraints apply.
  • llms.txt is a documentation index. It lists available pages with descriptions so agents know where to find information.
Use skill.md when you want agents to call the API directly. Use llms.txt when you want agents to browse the docs.

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Use skill.md with agents

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Skills CLI

Agents can process the skill.md with the skills CLI. 
npx skills add https://docs.upriver.ai

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Claude Code / OpenClaw

Add the URL to your project context or reference it in a prompt: 
curl -s https://docs.upriver.ai/skill.md >> AGENTS.md

Use the Upriver API as described in https://docs.upriver.ai/skill.md

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Cursor / Windsurf

Add it as a doc in your project settings:
  1. Go to Settings → Docs
  2. Add https://docs.upriver.ai/skill.md

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ChatGPT / Claude.ai

Paste the URL or file contents into your conversation: 
Here's the API reference: https://docs.upriver.ai/skill.md
Use it to help me call the Upriver API.

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Any agent or framework

Fetch it at build time or runtime: 
curl -s https://docs.upriver.ai/skill.md
The file is plain Markdown. Works anywhere that accepts text context.

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What’s in the file

The skill.md includes:
  • Metadata: API name, description, and base URL.
  • Authentication: How to authenticate requests.
  • Endpoints: Available actions organized by resource (brands, creators, audiences, trends, etc).
  • Parameters: Required and optional inputs for each endpoint.
  • Usage guidance: Tips on how to chain endpoints and handle responses.